Can we pump oil out of adminshop? Or at least buy oil buckets through a logistics network?
Also, it is possible (but maybe difficult) to make it so you don't need BC on client to join. But you would need it to see BC blocks/items and to become a builder.

Throw 2 eyes from 2 different spots few hundreds blocks apart. Write down coordinates and direction they flew. Write down equation of 2 lines. Find coordinates of their intersection and go there. If there is no stronghold there, go to yet another spot, throw another eye and repeat.